Julbo Baby's Looping II Sunglasses with Spectron 4 Lenses Spectron 4 Baby lens is a dark lens, blocking 95% of the visible light, for max protection for your child's eyes The symmetrical shape of the sunglass eliminates a right-side-up or wrong-side-up The hingeless design prevents little figures from being pinched Comes with a flat elastic strap in order to keep the sunglasses on your babies head Like all Julbo lenses, these lenses are optical category 1, guaranteeing 100% protection against UVA, B and C rays